Date: Thu, 17 Jan 2002 22:58:22 -0500 From: Florent Parent <Florent.Parent@viagenie.qc.ca> To: Archie Cobbs <archie@dellroad.org> Cc: freebsd-net@FreeBSD.ORG Subject: Re: netgraph: how to setsockopt on ksocket node ? Message-ID: <214190000.1011326302@blues.viagenie.qc.ca> In-Reply-To: <200201180216.g0I2G8k23055@arch20m.dellroad.org> References: <200201180216.g0I2G8k23055@arch20m.dellroad.org>
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--On 2002-01-17 18:16:08 -0800 archie@dellroad.org wrote:
> Florent Parent writes:
>> Anyone has an example on how to setsockopt on a ksocket node in netgraph?
>>
>> struct opts {
>> int level;
>> int name;
>> int value;
>> } myopts = { SOL_SOCKET, SO_REUSEADDR, 1
>> };
>>
>> ret = NgSendMsg(cs, epath, NGM_KSOCKET_COOKIE, NGM_KSOCKET_SETOPT,
>> (struct ng_ksocket_sockopt *)&myopts,
>> sizeof(myopts)));
>>
>> return error 14 "Bad address".
>>
>> Did some tracing in ng_ksocket.c and the struct sockopt sent as argument
>> to sosetopt() seems to contains sane values:
>>
>> sopt.sopt_val = 0xc182452c (pointer dereferences to 1)
>> sopt.sopt_valsize = 4
>
> What kind of socket?
UDP
>
> What version of FreeBSD?
4.5-PRERELEASE (~ 2 weeks old)
> That should work.. if the error is coming from the sosetopt()
> call then it's a socket problem rather than a netgraph problem.
>
> What if you create the socket normally and call setsockopt()?
Well that works just fine. I've attached normal.c which is a dummy example
using standard socket calls, and I've attached netgraph.c which wants to do
the same thing using a ksocket node. The latter fails with the following
debug:
netgraph: SENDING MESSAGE:
netgraph: SOCKADDR: { fam=32 len=9 addr=".dummy" }
netgraph: NG_MESG :
netgraph: vers 2
netgraph: arglen 12
netgraph: flags 0
netgraph: token 3
netgraph: cookie KSOCKET (942710669)
netgraph: cmd 7
netgraph: args (12 bytes)
netgraph: 0000: ff ff 00 00 00 02 00 00 01 00 00 00
............
netgraph: sendto(.dummy): Bad address
.dummy Cannot setopt the ksocket node: Bad address
It has to be the way I'm presenting the socket options arguments through
the netgraph interface. This is why I originally asked for any example on
doing a setsockopt through netgraph.
Thanks for the help
Florent.
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